Taku and Asamiko met at a bar and were drinking buddies, but now they are a couple. One day, Asamiko blurts out to Taku that she is once again involved in work with her ex-boyfriend, whom she had been dating without knowing that he was married. It's just like when she used to listen to his complaints before they started dating... Taku is worried that he can't be her number one, and his desire to monopolize her gets out of control...!